In brief:
Not sure/ck. heart.

This can still point to a problem with your heart since it seems to go to your left arm. Your age is somewhat early for heart disease, but a positive family history for coronary artery disease could still mean you have to check it out.

This is still nonspecific, so it could also be an early ulcer, or possibly an aneurysm in the aorta which has back pain. A full workup by your doctor would help.

In brief:
Not sure/ck. heart.

This can still point to a problem with your heart since it seems to go to your left arm. Your age is somewhat early for heart disease, but a positive family history for coronary artery disease could still mean you have to check it out.

This is still nonspecific, so it could also be an early ulcer, or possibly an aneurysm in the aorta which has back pain. A full workup by your doctor would help.
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